Diamond Whites Black Edition Liquid

I bought this a couple of weeks ago and having used it every day I am very impressed, my teeth feel clean and look whiter than they did previously.

This product is nothing but overpriced coconut oil. After using for a week, I have seen no improvement in whiteness in my teeth. Also with the product being oil, it is very impractical to 'swill around in the mouth for 10 - 20 minutes'. I found this...